When the cucumber in the greenhouse enters the flowering and fruiting stage, this situation often occurs. The cucumber that had a good growth some time ago suddenly died suddenly within a few days.
â— Cause weather. Sustained rain or sudden snow after snow, leading to rapid death.
Let off. Cucumber enters the flowering and fruiting stage. The temperature is high on sunny days, the amount of wind is large, and the leaf surface transpiration is fast. Some plants with poor hair roots start to shrink, and those with severe water loss wither.
Freezing damage. The shed membrane was partially damaged, and the plants withered and died after the cold wind hit.
Fertilize. The fertilization concentration is too large, especially the chemical fertilizer is applied near the base of the stem of the cucumber, and the burns lead to dead seedlings.
â— Precautions Watering in moderation. The root system of cucumber is relatively developed, but new roots are mostly concentrated on the surface of the soil. Avoid watering errors and inhibit root development. Plant less water and return to seedling water as appropriate. The temperature is low, the soil humidity is high, or if there is even rainy weather, less or no water will be returned to the seedlings. Enter into the fruiting period, combine with topdressing, apply water with fertilizer, and apply it every 10 days or so to prevent excessive fertilization from burning the seedlings. It should be watered in the morning on sunny days, and avoid watering in the afternoon and evening. It is not advisable to water the whole shed in a cloudy and snowy day.
Reasonably control the temperature in the shed. In the early stage of planting, it is generally not ventilated, and it is kept at 25-30 ° C in the shed during the day and 12-15 ° C at night. With the growth of melon seedlings, it is possible to gradually open a small air outlet to ventilate. Generally, when the air temperature rises to 30 ° C during the day, the air is ventilated, and when the afternoon drops to 28 ° C, the shed film is closed.
Drain and irrigate in time. Regularly ditch the ditch around the greenhouse to ensure smooth flow for timely drainage and irrigation. Check the shed film for damage or leaking cover every day. If it is damaged, pay attention to repair it in time. Cover the grasshoppers before the wind comes, and lock the ropes to prevent cold wind from invading and hurting the seedlings.
Protect from strong light. After a cloudy day, it suddenly clears up. Do not expose all the grasshoppers, but expose them at intervals, to prevent the plants from dehydration and wilting due to strong light. After 2 to 3 days, the plants gradually adapt to normal management.
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